Kamen Rider 4
Kamen Rider 4 (仮面ライダー4号 Kamen Raidā Yongō) is another Kamen Rider who should not exist but is created by Shocker to alter history, just as they did with Kamen Rider 3. As a Kamen Rider, he pilots a plane called the Sky Cyclone (スカイサイクロン Sukai Saikuron). He is sent back in time with the History Modification Machine because Takumi Inui's wish to protect people without having them die caused a time paradox to allow for his existence. He is assisted in his attempts to change history by Kamen Riders Ouja, Sasword, Dark Kiva, and Baron, until he is destroyed by Drive Type Formula.
Kamen Rider 4 is voiced by Mitsuru Matsuoka (松岡 充 Matsuoka Mitsuru).